MORGAN HILL — Police are cautioning residents to be on the alert in the wake of three suspected intrusions since Thursday, escalating in severity from suspicious sightings to burglary and home invasion.

“The Morgan Hill Police Department wants to take this time to remind our community to lock their windows and doors even when they are home and beware of their surroundings,” a police statement read.

The most recent instance was reported Monday morning around 9:30 a.m., when officers were called to the 17000 block of Rosemary Circle for a report of a home invasion. Residents were startled by two masked intruders who claimed to have weapons and demanded the victims open a safe.

No weapon was ever seen, and the residents were uninjured, but the suspects fled with an undisclosed amount of cash, according to Morgan Hill police. They were described by police as Latino males, based on their apparent speaking accents, with one about 5 feet 3 inches tall, 140 pounds, and the other standing about 5 feet 4 inches tall and 150 pounds, wearing a black hooded sweatshirt and dark pants. Police said they may have fled in a dark-silver vehicle, and are seeking home-surveillance video in the area.

Another burglary appears to have been thwarted about 9:15 a.m. Friday when a resident in the 400 block of Cascades Court reportedly saw a masked male trying to pry his way into her home. The resident told police that the would-be intruder ran off when she opened up her blinds.

In that case, police described a male suspect standing 5 feet 7 inches tall, with a thin build, wearing black beanie with eye and mouth openings, black or blue jeans, and a gray sweatshirt. He apparently ran south toward Community Park, and might be associated with a dark-colored SUV spotted in the area at the time of the call.

Police also got a call Thursday around 6:35 a.m. from a resident in the 17000 block of Tassajara Circle reporting a suspicious dark-skinned male wearing black and gray clothing standing in the resident”s back yard.

Anyone with information about the aforementioned encounters can contact Detective Fernando Del Moral at 408-779-2101.